feat: Add `deno serve` subcommand (#23511)

By default, `deno serve` will assign port 8000 (like `Deno.serve`).
Users may choose a different port using `--port`.

`deno serve /tmp/file.ts`

`server.ts`:
```ts
export default {
  fetch(req) {
    return new Response("hello world!\n");
  },
};
```

1 files changed, 2 insertions, 0 deletions

diff --git a/cli/tools/test/mod.rs b/cli/tools/test/mod.rs
index 013d8c084..ffa0fef9e 100644
--- a/cli/tools/test/mod.rs
+++ b/cli/tools/test/mod.rs
@@ -59,6 +59,7 @@ use deno_runtime::permissions::Permissions;
 use deno_runtime::permissions::PermissionsContainer;
 use deno_runtime::tokio_util::create_and_run_current_thread;
 use deno_runtime::worker::MainWorker;
+use deno_runtime::WorkerExecutionMode;
 use indexmap::IndexMap;
 use indexmap::IndexSet;
 use log::Level;
@@ -583,6 +584,7 @@ async fn configure_main_worker(
 ) -> Result<(Option<Box<dyn CoverageCollector>>, MainWorker), anyhow::Error> {
   let mut worker = worker_factory
     .create_custom_worker(
+      WorkerExecutionMode::Test,
       specifier.clone(),
       PermissionsContainer::new(permissions),
       vec![ops::testing::deno_test::init_ops(worker_sender.sender)],